There are a lot of mysteries about quantum mechanics, but they mostly arise in very detailed measurements in controlled settings.

If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet.

[T]he atoms or elementary particles themselves are not real; they form a world of potentialities or possibilities rather than one of things or facts.

The mathematics of quantum mechanics very accurately describes how our universe works.

In 1924, I became a Dozent in Gottingen and worked out the quantum mechanics during a holiday stay on Heligoland.

Classical mechanics gave us a deterministic view of the world. Quantum mechanics, conversely, gives us a probabilistic view instead. According to Newton, if you know the cause af an event, you can predict the outcome. According to M.Born, you can only predict how likely that outcome will be.